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Decode directly into the audio renderer's buffer to avoid a copy

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This commit is contained in:
Cameron Gutman
2019-05-01 21:27:41 -07:00
parent 187f47a353
commit 21f2b1224a
9 changed files with 70 additions and 63 deletions
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app/streaming/audio/renderers/sdlaud.cpp
+20 -4
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@@ -6,7 +6,8 @@
#include <QtGlobal>
SdlAudioRenderer::SdlAudioRenderer()
: m_AudioDevice(0)
: m_AudioDevice(0),
m_AudioBuffer(nullptr)
{
SDL_assert(!SDL_WasInit(SDL_INIT_AUDIO));
if (SDL_InitSubSystem(SDL_INIT_AUDIO) != 0) {
@@ -37,7 +38,13 @@ bool SdlAudioRenderer::prepareForPlayback(const OPUS_MULTISTREAM_CONFIGURATION*
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to open audio device: %s",
SDL_GetError());
SDL_QuitSubSystem(SDL_INIT_AUDIO);
return false;
}
m_AudioBuffer = malloc(SAMPLES_PER_FRAME * sizeof(short) * opusConfig->channelCount);
if (m_AudioBuffer == nullptr) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to allocate audio buffer");
return false;
}
@@ -65,13 +72,22 @@ SdlAudioRenderer::~SdlAudioRenderer()
SDL_CloseAudioDevice(m_AudioDevice);
}
if (m_AudioBuffer != nullptr) {
free(m_AudioBuffer);
}
SDL_QuitSubSystem(SDL_INIT_AUDIO);
SDL_assert(!SDL_WasInit(SDL_INIT_AUDIO));
}
bool SdlAudioRenderer::submitAudio(short* audioBuffer, int audioSize)
void* SdlAudioRenderer::getAudioBuffer(int*)
{
if (SDL_QueueAudio(m_AudioDevice, audioBuffer, audioSize) < 0) {
return m_AudioBuffer;
}
bool SdlAudioRenderer::submitAudio(int bytesWritten)
{
if (SDL_QueueAudio(m_AudioDevice, m_AudioBuffer, bytesWritten) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Failed to queue audio sample: %s",
SDL_GetError());